Rollup merge of #74374 - cuviper:lto-bitcode-1.45, r=Mark-Simulacrum
Rollup merge of #74374 - cuviper:lto-bitcode-1.45, r=Mark-Simulacrum

Add a 1.45 release note on lto vs. embed-bitcode

I added a bullet for Cargo's use of `embed-bitcode`, since that was even noteworthy enough for the Inside Rust blog. Then more importantly, I added a compatibility note for how this may interact poorly with manually enabling LTO.

r? @Mark-Simulacrum

graydon/rust,aidancully/rust,aidancully/rust,aidancully/rust,graydon/rust,aidancully/rust,graydon/rust,graydon/rust,graydon/rust,graydon/rust,aidancully/rust,aidancully/rust